Practice Exam Format (9.1) - Introduction - part B - Environmental Quality Monitoring & Analysis,

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9 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a surrogate compound?
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Think about how it helps in analysis.
Question 2.
Why do we use hexane in extraction?
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Consider the properties of hexane.
3Question 3.
What is the role of a surrogate in chemical analysis?
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Recall how surrogates aid in analytical efficiency.
4Question 4.
True or False: Calibration is not necessary for instrument response.
- True
- False
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Think about the calibration curve and its significance.
Question 5.
You have a sample with a known concentration of 200 ng/L. After extraction and calibration, you recover 50 ng/L as your surrogate. What is your recovery percentage, and what does this indicate?
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Use the recovery formula from the class.
Question 6.
If 100 mL of solution yields 10 ng of analyte after analysis, calculate the concentration in ng/mL. If the instrument requires a minimum detection of 5 ng/mL, is this sample adequate?
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Remember to think about dilution requirements!

5 more questions in this section. Enroll free to practise them all.